Outdoor Unit: Abnormal Discharge Pipe Temperature - Panasonic Urban Multi MX1R Series Service Manual

PACD011001C2
3.18 Outdoor Unit:
F3 F3 F3 F3
Remote Controller
Display
„ Abnormal discharge pipe temperature
Supposed Causes
„ Defect of discharge pipe thermistor (CU-5 : R3T CU-8·10 : R3-1T, R3-2T)
„ Defect of outdoor unit PC board
„ Discharge pipe thermistor wrong connection
„ Liquid injection solenoid valve wrong connection
Troubleshooting
Note:
Troubleshooting Urban Multi "MX1, ME1 Series" Using R-22
Abnormal Discharge Pipe Temperature
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Discharge pipe
YES
temperature is 135˚C
or higher.
NO
Are the
characteristics
of the discharge pipe
thermistor normal?
NO
R3T or R3-1T, R3-2T
(For the characteristics
table.)
YES
CU-5
R3T
MX1 X17A
ME1 –
Is there
a wrong
connection of the
YES
discharge pipe thermistor?
R3T or R3-1T (inverter side),
R3-2T (standard
side)
NO
Is there a
YES
wrong connection of the
injection solenoid valves
Y3S and Y4S?
NO
CU-8·10
R3-1T (Inverter)
X17A
X16A
Troubleshooting
Connect correctly and turn on again.
Refrigerant shortage, compressor
defect, etc. Defect of the refrigerant
system.
Replace the discharge pipe thermistor.
Replace outdoor unit PC board A1P.
R3-2T (Standard)
X18A
X17A
(VF044)
173